01 - Preheat the air fryer to 360°F for 5 minutes.
02 - Divide the pizza dough into four equal portions. Roll each piece into a 6-inch circle on a lightly floured surface.
03 - In a mixing bowl, thoroughly combine chicken, mozzarella, Parmesan, Alfredo sauce, spinach if using, minced garlic, Italian seasoning, salt, and pepper.
04 - Spoon one quarter of the filling onto half of each dough circle, leaving a 1/2-inch border at the edge.
05 - Top the filling with a portion of shredded cheddar cheese for extra crispiness, if using.
06 - Fold the dough over the filling to form a half-moon. Pinch the edges firmly to seal, then crimp with a fork for extra security.
07 - Brush the calzone tops lightly with beaten egg, then brush or drizzle with olive oil to promote golden crispness.
08 - Place calzones in a single layer in the air fryer basket, working in batches if required.
09 - Air fry at 360°F for 12 to 15 minutes until the calzones are golden and crisp.
10 - Allow calzones to cool for 2 to 3 minutes before serving.